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</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! Render static and dynamic map elements.</span>

<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Distance</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">IntersectionID</span>, <span class="ident">Map</span>, <span class="ident">NORMAL_LANE_THICKNESS</span>, <span class="ident">SIDEWALK_THICKNESS</span>};
<span class="kw">use</span> <span class="ident">sim</span>::{<span class="ident">DrawCarInput</span>, <span class="ident">VehicleType</span>};
<span class="kw">use</span> <span class="ident">widgetry</span>::{<span class="ident">GfxCtx</span>, <span class="ident">Prerender</span>};

<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">colors</span>::<span class="ident">ColorScheme</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">agents</span>::{<span class="ident">AgentCache</span>, <span class="ident">UnzoomedAgents</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">area</span>::<span class="ident">DrawArea</span>;
<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">bike</span>::<span class="ident">DrawBike</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">building</span>::<span class="ident">DrawBuilding</span>;
<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">car</span>::<span class="ident">DrawCar</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">intersection</span>::{<span class="ident">calculate_corners</span>, <span class="ident">DrawIntersection</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">map</span>::<span class="ident">DrawMap</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">pedestrian</span>::{<span class="ident">DrawPedCrowd</span>, <span class="ident">DrawPedestrian</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">turn</span>::{<span class="ident">DrawMovement</span>, <span class="ident">DrawUberTurnGroup</span>};
<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">AppLike</span>, <span class="ident">ID</span>};

<span class="kw">mod</span> <span class="ident">agents</span>;
<span class="kw">mod</span> <span class="ident">area</span>;
<span class="kw">mod</span> <span class="ident">bike</span>;
<span class="kw">mod</span> <span class="ident">building</span>;
<span class="kw">mod</span> <span class="ident">bus_stop</span>;
<span class="kw">mod</span> <span class="ident">car</span>;
<span class="kw">mod</span> <span class="ident">intersection</span>;
<span class="kw">mod</span> <span class="ident">lane</span>;
<span class="kw">mod</span> <span class="ident">map</span>;
<span class="kw">mod</span> <span class="ident">parking_lot</span>;
<span class="kw">mod</span> <span class="ident">pedestrian</span>;
<span class="kw">mod</span> <span class="ident">road</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">traffic_signal</span>;
<span class="kw">mod</span> <span class="ident">turn</span>;

<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">BIG_ARROW_THICKNESS</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance</span>::<span class="ident">const_meters</span>(<span class="number">0.5</span>);

<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">CROSSWALK_LINE_THICKNESS</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance</span>::<span class="ident">const_meters</span>(<span class="number">0.15</span>);

<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">OUTLINE_THICKNESS</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance</span>::<span class="ident">const_meters</span>(<span class="number">0.5</span>);

<span class="comment">// Does something belong here or as a method on ID? If it ONLY applies to renderable things, then</span>
<span class="comment">// here. For example, trips aren&#39;t drawn, so it&#39;s meaningless to ask what their bounding box is.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Renderable</span> {
    <span class="comment">// TODO This is expensive for the PedCrowd case. :( Returning a borrow is awkward, because most</span>
    <span class="comment">// Renderables are better off storing the inner ID directly.</span>
    <span class="kw">fn</span> <span class="ident">get_id</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">ID</span>;
    <span class="comment">// Only traffic signals need UI. :\</span>
    <span class="kw">fn</span> <span class="ident">draw</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">g</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GfxCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">dyn</span> <span class="ident">AppLike</span>, <span class="ident">opts</span>: <span class="kw-2">&amp;</span><span class="ident">DrawOptions</span>);
    <span class="comment">// Higher z-ordered objects are drawn later. Default to low so roads at -1 don&#39;t vanish.</span>
    <span class="kw">fn</span> <span class="ident">get_zorder</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">isize</span> {
        <span class="op">-</span><span class="number">5</span>
    }
    <span class="comment">// This outline is drawn over the base object to show that it&#39;s selected. It also represents</span>
    <span class="comment">// the boundaries for quadtrees. This isn&#39;t called often; don&#39;t worry about caching.</span>
    <span class="kw">fn</span> <span class="ident">get_outline</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Polygon</span>;
    <span class="kw">fn</span> <span class="ident">contains_pt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="self">self</span>.<span class="ident">get_outline</span>(<span class="ident">map</span>).<span class="ident">contains_pt</span>(<span class="ident">pt</span>)
    }
}

<span class="kw">fn</span> <span class="ident">draw_vehicle</span>(
    <span class="ident">input</span>: <span class="ident">DrawCarInput</span>,
    <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>,
    <span class="ident">prerender</span>: <span class="kw-2">&amp;</span><span class="ident">Prerender</span>,
    <span class="ident">cs</span>: <span class="kw-2">&amp;</span><span class="ident">ColorScheme</span>,
) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="ident">dyn</span> <span class="ident">Renderable</span><span class="op">&gt;</span> {
    <span class="kw">if</span> <span class="ident">input</span>.<span class="ident">id</span>.<span class="number">1</span> <span class="op">=</span><span class="op">=</span> <span class="ident">VehicleType</span>::<span class="ident">Bike</span> {
        <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">DrawBike</span>::<span class="ident">new</span>(<span class="ident">input</span>, <span class="ident">map</span>, <span class="ident">prerender</span>, <span class="ident">cs</span>))
    } <span class="kw">else</span> {
        <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">DrawCar</span>::<span class="ident">new</span>(<span class="ident">input</span>, <span class="ident">map</span>, <span class="ident">prerender</span>, <span class="ident">cs</span>))
    }
}

<span class="doccomment">/// Control how the map is drawn.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">DrawOptions</span> {
    <span class="doccomment">/// Don&#39;t draw the current traffic signal state.</span>
    <span class="kw">pub</span> <span class="ident">suppress_traffic_signal_details</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">IntersectionID</span><span class="op">&gt;</span>,
    <span class="doccomment">/// Label every building.</span>
    <span class="kw">pub</span> <span class="ident">label_buildings</span>: <span class="ident">bool</span>,
    <span class="doccomment">/// Draw building paths.</span>
    <span class="kw">pub</span> <span class="ident">show_building_paths</span>: <span class="ident">bool</span>,
}

<span class="kw">impl</span> <span class="ident">DrawOptions</span> {
    <span class="doccomment">/// Default options for drawing a map.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">DrawOptions</span> {
        <span class="ident">DrawOptions</span> {
            <span class="ident">suppress_traffic_signal_details</span>: <span class="ident">Vec</span>::<span class="ident">new</span>(),
            <span class="ident">label_buildings</span>: <span class="bool-val">false</span>,
            <span class="ident">show_building_paths</span>: <span class="bool-val">true</span>,
        }
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unzoomed_agent_radius</span>(<span class="ident">vt</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">VehicleType</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Distance</span> {
    <span class="comment">// Lane thickness is a little hard to see, so double it. Most of the time, the circles don&#39;t</span>
    <span class="comment">// leak out of the road too much.</span>
    <span class="kw">if</span> <span class="ident">vt</span>.<span class="ident">is_some</span>() {
        <span class="number">4.0</span> <span class="op">*</span> <span class="ident">NORMAL_LANE_THICKNESS</span>
    } <span class="kw">else</span> {
        <span class="number">4.0</span> <span class="op">*</span> <span class="ident">SIDEWALK_THICKNESS</span>
    }
}
</pre></div>
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